I am running limited travel Morel hydraulic roller lifters in my big block with a Howard's cam. A couple of seasons with them, which comprises of about 60 1/4 mile drag strip passes, and about 5,000 street miles. I have the engine apart now because I put a stroker kit into the 440, and i plan to take the lifters apart, ultrasonic clean them, and throw them back together and into the engine.

Trickflow sells hydraulic rollers that i suspect are probably made by Morel - but I can't prove that. They just look VERY similar.